package main

import "fmt"
import "unsafe"

// 枚举
const (
	aa = "abc"
	bb = len(aa)
	cc = unsafe.Sizeof(aa)
)

func main() {

	//常量
	const LENGTH int = 10
	const WIDTH int = 5
	var area int
	const a, b, c = 1, false, "str"

	area = LENGTH * WIDTH
	fmt.Printf("面积为 ： %d\n", area)
	println("==================================")
	println(a, b, c)

	println("==================================")
	println(aa, bb, cc)
}
